8.2 Future Scopes of Work
8.2.3 Power Flow Analysis of an AC-DC Distribution Network
This topic is in line of the recent trend of hybrid microgrids. Current unbalanced AC network load flow distribution analysis can be expanded into AC-DC distribution network analysis.
Appendix A
Smaller Test System
Figure A.1: 30 bus weakly meshed distribution system with induction motor and generator.
Table A.1: System line data
Branch From To Resistance Reactance
number bus bus (pu) (pu)
1 1 2 0.0967 0.0397
2 2 3 0.0886 0.0364
3 3 4 0.1359 0.0377
4 4 5 0.1236 0.0343
5 5 6 0.1236 0.0343
6 6 7 0.2598 0.0446
7 7 8 0.1732 0.0298
8 8 9 0.2598 0.0446
9 9 10 0.1932 0.0298
10 10 11 0.2083 0.0186
11 11 12 0.0866 0.0149
12 3 13 0.1299 0.0223
13 13 14 0.1732 0.0298
14 14 15 0.0866 0.0149
15 15 16 0.0433 0.0074
16 6 17 0.1483 0.0412
17 17 18 0.1359 0.0377
18 18 19 0.1718 0.0291
19 19 20 0.1562 0.0355
20 20 21 0.1962 0.0355
21 21 22 0.2165 0.0372
22 22 23 0.3165 0.0372
23 23 24 0.2598 0.0446
24 24 25 0.1732 0.0198
25 25 26 0.1083 0.0186
26 26 27 0.0866 0.0149
27 7 28 0.1299 0.0223
28 28 29 0.2299 0.0223
29 29 30 0.1299 0.0273
30 4 14 0.1732 0.0298
31 9 29 0.0866 0.0149
32 11 19 0.0433 0.0074
Table A.2: System nominal load data
Constant power load Constant current load Constant impedance load Induction motor load Bus
No
Active power (pu)
Reactive power
(pu)
Active power (pu)
Reactive power
(pu)
Active power (pu)
Reactive power
(pu)
Active power (pu)
Reactive power
(pu)
1 0.00367 0.00191 0.00044 0.00022 0 0 0 0
2 0.00307 0.00148 0 0 0.00083 0.00041 0 0
3 0.00368 0.00195 0.00014 0.00012 0 0 0 0
4 0.00268 0.00191 0.00027 0.00019 0 0 0 0
5 0.00469 0.00231 0 0 0.00015 5.23E-05 0.01491 0.00404
6 0.00368 0.00191 0.00064 0.00022 0.00037 0.00019 0 0
7 0.00368 0.00191 0.00094 0.00032 0 0 0 0
8 0.00268 0.00191 0.00043 0.00032 0.00063 0.00022 0 0
9 0.00468 0.00191 0 0 0.00025 0.00012 0.01491 0.00404
10 0.00368 0.00291 0 0 0 0 0 0
11 0.00307 0.00158 0 0 0 0 0 0
12 0.00261 0.00132 0 0 0 0 0.01491 0.00404
13 0.00158 0.00082 0.00016 8.24712E-05 0.00042 1.82E-05 0 0
14 0.00468 0.00191 0.00047 0.00019 0 0 0.01491 0.00404
15 0.00368 0.00291 0.00037 0.00029 0.00094 0.00033 0 0
16 0.00054 0.00033 0 0 5.40E-05 3.29E-05 0 0
17 0.00368 0.00191 0.00084 0.00022 0 0 0 0
18 0.00568 0.00191 0.00016 1.91379E-05 0 0 0.00746 0.00202
19 0.00368 0.00191 0.00037 0.00019 0 0 0 0
20 0.00368 0.00151 0.00037 0.00015 0 0 0 0
21 0.00768 0.00191 0 0 0.00028 0.00012 0.004028 0.00109
22 0.00368 0.00191 0 0 3.68E-05 1.91E-05 0 0
23 0.01268 0.00191 0 0 0 0 0 0
24 0.00368 0.00191 0.00014 2.19138E-05 0.00054 0.00022 0 0
25 0.00054 0.00033 6.53998E-05 3.32874E-05 5.40E-05 3.29E-05 0.01491 0.00404
26 0.00368 0.00191 0 0 0 0 0 0
27 0.00568 0.00191 0.00057 0.00019 0.00016 0.00012 0 0
28 0.00158 0.00082 0.00012 5.82471E-06 0 0 0.00746 0.00202
29 0.00368 0.00158 0 0 0.00031 0.00016 0 0
30 0.00158 0.00082 0.00016 8.24712E-05 0 0 0 0
Appendix B
Bigger Test System
DG1
DG4
DG2
DG5
DG3
1
2 3
4
5
6 7 8
9 10 11
12 14 13
15
16 17
18 19
20 21
22 23
24 25
26 27
28 29
30 31
32 33
34
35 36 37
38 43
44
39 41 40
42 45
47 46
48 49 50
51
52 53
54 55
56 57 58
59 60 61 62
63 64
65 66
67 68
69 70 71
72
73 74
75 76
77
78 79
80 81
82 83
84 85
86 87
88 89
90 91
93 92 94
95 96
97 98
99 100
101 102
103 104
105 106
107
108 109
110 111
112
113 114
115 116
118 119
120 121 122 123
117
Figure B.1: Single line diagram of the modified 123-bus system with DGs and links.
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